Hit 80 on my paladin today. As near as I can tell, this is my fastest to 80 ever by a lot - 6 days, 38 minutes played time. (So close to being under 6 days too...)
I'm now debating the next toon to level to 80 - either mage, rogue, or shaman. I did a little poll of my guild, and they're vote seemed to be for the rogue, but I haven't actually leveled a caster since my very first toon, so personally, I'm sort of leaning toward the mage.
Feel free to vote in the comment section!
Everyone keeps telling me how much massive fun Rogues are though, so it's tempting.